There is already some 3D support inside Animator. Most of the 3D CSS3 properties are already available: if you select an object you can edit the scale, position and rotation for all three axises: x, y and z. Additionally under Scene Properties -> Advanced you can find the properties for perspective and perspective origin. You will not be able to see changes on the stage when you change these properties, as 3D rendering is not supported inside Animator yet, but if you preview the project in the browser you will be able to see the transformations in 3D properly.